From Hardtack to Home Fries: An Uncommon History of American Cooks and Meals by Barbara Haber was an excellent read that detailed cookbooks from the FDR White House, WWII Japanese Interment Camps in the Philippines, African American Cookbooks and more.
One of the chapters, Chapter 3: They Dieted for Our Sins: America's Food Reformers, discusses dietary reformers such as Sylvester Graham and the Kelloggs. Their 19th century food ideas are intertwined with the dietary ideas of Ellen G. White, founder of the Seventh-day Adventists. Haber has some interesting history of these early diet reformers and how their ideas has shaped the way we eat today.
For those with Seventh-day Adventist ancestors, you may want to read more about the history and beliefs of the early church. Haber includes in her annotated bibliography some books that you may be itnerested in.
Numbers, Ronald L. Prophetess of Health: A Study of Ellen G. White. New York: Harper & Row, 1976.
Graham, Roy E. Ellen G. White, Co-founder of the Seventh-day Adventist Church. New York: Peter Lang, 1985.
She also includes books about Graham and Kellog in this bibliography as well.
While this posting isn't the typical posting about church records, I think the social history of our ancestors is important and this look at the dietary reformers is one that is vital to understanding the history of the Seventh-day Adventist church.